More advice needed ! 2.0 or 2.5 ?
10 July 2007, 10:13 PM
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More advice needed ! 2.0 or 2.5 ?
Following my previous thread about choosing a 2.0 rebuild or 2.5 I have been given a full estimate for both builds and need some more advice on which way to go ?
Details of both builds:
2.0-My exisiting unit rebuilt with fully forged internals to be capable of handling 400-450bhp using ACL main bearings,ACL big end bearings,Wiseco pistons,Fast road rod set(unsure of brand). Supply TD05 18g turbo.
Remap Power FC-predicted power 350bhp/350 ft lbs but could be closer to 400bhp with the other mods I have fitted.
Fitted price including vat,turbo and remap etc: £3726.01
2.5 Build.
2.5 Sti block capable of handling upto 400bhp,with my existing TD05 and current mods predicted power is 330bhp/370 ft lbs-earlier than the 2.0 and a wider torque spread.
Fitted price including vat and full remap: £3556.91
Advice on both options would be great.
I was pretty sure I wanted the 2.5 but have been told it's nowhere near as strong as the forged 2.0 will be and also with the extra torque of the 2.5 it'll probably kill my gearbox sooner !
Details of both builds:
2.0-My exisiting unit rebuilt with fully forged internals to be capable of handling 400-450bhp using ACL main bearings,ACL big end bearings,Wiseco pistons,Fast road rod set(unsure of brand). Supply TD05 18g turbo.
Remap Power FC-predicted power 350bhp/350 ft lbs but could be closer to 400bhp with the other mods I have fitted.
Fitted price including vat,turbo and remap etc: £3726.01
2.5 Build.
2.5 Sti block capable of handling upto 400bhp,with my existing TD05 and current mods predicted power is 330bhp/370 ft lbs-earlier than the 2.0 and a wider torque spread.
Fitted price including vat and full remap: £3556.91
Advice on both options would be great.
I was pretty sure I wanted the 2.5 but have been told it's nowhere near as strong as the forged 2.0 will be and also with the extra torque of the 2.5 it'll probably kill my gearbox sooner !
10 July 2007, 10:27 PM
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I'm not being funny but, why would you spend £3500 on an 11 year old car?
Why not move on and spend your money on a newer car. (whats the value of your car as it stands?)
Sooner or later you will want to sell up anyway, and you'll never get that £3500 back
Why not move on and spend your money on a newer car. (whats the value of your car as it stands?)
Sooner or later you will want to sell up anyway, and you'll never get that £3500 back
10 July 2007, 10:34 PM
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For £3500 I will have around a 400bhp Impreza which has everything else to match such as suspension etc.
I'm aware I won't get the £3500 back but that's not an issue really.
I've been offered £4000 for the car as it stands but can't really find anything else that i'm interested in !
10 July 2007, 10:48 PM
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I take it you have the original heads so a redline of 7400 rpm?
Looking at your profile you already have a gearbox that should handle the torque so I'd go for the 2.5
Whilst you're there spend another £600 on some pistons to make it future turbo proof - with hindsight I wish I did when I got my 257 a couple of years back
Looking at your profile you already have a gearbox that should handle the torque so I'd go for the 2.5
Whilst you're there spend another £600 on some pistons to make it future turbo proof - with hindsight I wish I did when I got my 257 a couple of years back
10 July 2007, 11:18 PM
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I take it you have the original heads so a redline of 7400 rpm?
Looking at your profile you already have a gearbox that should handle the torque so I'd go for the 2.5
Whilst you're there spend another £600 on some pistons to make it future turbo proof - with hindsight I wish I did when I got my 257 a couple of years back
Looking at your profile you already have a gearbox that should handle the torque so I'd go for the 2.5
Whilst you're there spend another £600 on some pistons to make it future turbo proof - with hindsight I wish I did when I got my 257 a couple of years back
10 July 2007, 11:51 PM
#7
Because I haven't had the car very long and don't really want to sell it on.
For £3500 I will have around a 400bhp Impreza which has everything else to match such as suspension etc.
I'm aware I won't get the £3500 back but that's not an issue really.
I've been offered £4000 for the car as it stands but can't really find anything else that i'm interested in !
For £3500 I will have around a 400bhp Impreza which has everything else to match such as suspension etc.
I'm aware I won't get the £3500 back but that's not an issue really.
I've been offered £4000 for the car as it stands but can't really find anything else that i'm interested in !
Trending Topics
11 July 2007, 09:37 AM
#8
A 2.0 with approx 350 bhp is good...
A 2.5 with 350 bhp is even better, due to the increased torque...
You are right in that a forged 2.0 is stronger than a std STi 2.5 bottom end...
BUT, if you are after more than 350bhp, then simply put a set of pistons in the 2.5 and you have the basis for a good useable, reliable 400/400 motor..
For road use, you simply can't beat the grunt of the 2.5
A 2.5 with 350 bhp is even better, due to the increased torque...
You are right in that a forged 2.0 is stronger than a std STi 2.5 bottom end...
BUT, if you are after more than 350bhp, then simply put a set of pistons in the 2.5 and you have the basis for a good useable, reliable 400/400 motor..
For road use, you simply can't beat the grunt of the 2.5
11 July 2007, 10:42 AM
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You don't have to map the 2.5 for the gearbox breaking torque though. You could map the 2.5 to give the same torque as the 2.0 to make it gearbox friendly, but it will come in earlier and be a nicer drive.
Also IMO the 2.0 build needs better heads to get the most out of it - the short engine might be capable of 450+ but the heads won't be.
If you really think that 380 - 400 HP is as far as you'll ever take the engine then a stock 2.5 is the way to go IMO with your heads. If you can stretch another £600 for the pistons then all the better.
Also IMO the 2.0 build needs better heads to get the most out of it - the short engine might be capable of 450+ but the heads won't be.
If you really think that 380 - 400 HP is as far as you'll ever take the engine then a stock 2.5 is the way to go IMO with your heads. If you can stretch another £600 for the pistons then all the better.
11 July 2007, 01:06 PM
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Because I haven't had the car very long and don't really want to sell it on.
For £3500 I will have around a 400bhp Impreza which has everything else to match such as suspension etc.
I'm aware I won't get the £3500 back but that's not an issue really.
I've been offered £4000 for the car as it stands but can't really find anything else that i'm interested in !
For £3500 I will have around a 400bhp Impreza which has everything else to match such as suspension etc.
I'm aware I won't get the £3500 back but that's not an issue really.
I've been offered £4000 for the car as it stands but can't really find anything else that i'm interested in !
Cheers
Martin
11 July 2007, 01:45 PM
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To me the choice depends on your use, if its a second 'fun' car you only drive at weekends, I think you'll get more smiles/mileout of the 2.0, as a daily driver commuting etc, the lazier nature of the 2.5 would probably be preferable to the all or nothing 2.0.
Simon
Simon
11 July 2007, 09:38 PM
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Thanks for the replies guys.
I really have a dilemma now as I can't choose between the 2 options !
There's so many pro's and con's for each
I really have a dilemma now as I can't choose between the 2 options !
There's so many pro's and con's for each
12 July 2007, 03:30 AM
#13
It's a shame you couldn't have a drive of the 2 optoins TBH...
I have a 2.5, 420-450 bhp, and a friend of mine has a 2.0 with 420 bhp..
The difference in driving on the road is unreal...
Good luck m8
I have a 2.5, 420-450 bhp, and a friend of mine has a 2.0 with 420 bhp..
The difference in driving on the road is unreal...
Good luck m8
12 July 2007, 07:32 AM
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12 July 2007, 09:22 AM
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Its the faster response and torque delivery of the 2.5 that does it for me.
The difference is like having filled your car with 3 fat blokes when jumping from a 2.5 to a 2.0 with similar power.
Andy
The difference is like having filled your car with 3 fat blokes when jumping from a 2.5 to a 2.0 with similar power.
Andy
12 July 2007, 10:49 AM
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!!
12 July 2007, 07:06 PM
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The 2.5 sounds impressive but I have other things to take into account.
£4000 is really my max budget for this build-the 2.5 build is using the standard STI 2.5 short block and my standard TD05 turbo. If I start adding forged pistons and a better turbo it's going to be way over my budget !
Also,alot of people are telling me the 2.0 will be much stronger and potentially be more reliable than the 2.5.
Any thoughts on this ?
£4000 is really my max budget for this build-the 2.5 build is using the standard STI 2.5 short block and my standard TD05 turbo. If I start adding forged pistons and a better turbo it's going to be way over my budget !
Also,alot of people are telling me the 2.0 will be much stronger and potentially be more reliable than the 2.5.
Any thoughts on this ?
12 July 2007, 07:59 PM
#23
Ive got a 2.5 forge internals with uk standard heads, TD05 20g. 1bar of boost arrives at 2800rpm, with full boost coming just after 3000rpm. If you want low down grunt and the extra torque a 2.5 gives you over a 2.0 then there is no choice. However if you like to wait to near 4000rpm then have a punch as the turbo kicks in, get a 2.0 setup
12 July 2007, 08:17 PM
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Ive got a 2.5 forge internals with uk standard heads, TD05 20g. 1bar of boost arrives at 2800rpm, with full boost coming just after 3000rpm. If you want low down grunt and the extra torque a 2.5 gives you over a 2.0 then there is no choice. However if you like to wait to near 4000rpm then have a punch as the turbo kicks in, get a 2.0 setup
12 July 2007, 09:27 PM
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Looking at Zen's website
2.5 engine fitted £3046
Remap £329
Wiseco pistons £617
Thats £4k
Or you could forget the pistons and get your td05 converted to a 20g by Andy.F for £550 +VAT, thats another way of spending £4k
But I'd go with the pistons, enjoy the TD05 and upgrade the turbo at a later date when funds allow IMO
2.5 engine fitted £3046
Remap £329
Wiseco pistons £617
Thats £4k
Or you could forget the pistons and get your td05 converted to a 20g by Andy.F for £550 +VAT, thats another way of spending £4k
But I'd go with the pistons, enjoy the TD05 and upgrade the turbo at a later date when funds allow IMO
12 July 2007, 09:59 PM
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Good point, how long are you prepared to wait? With the strong £ to $ pop over to the axis website and import a ready built forged 2.5 short motor
AXIS POWER RACING- Stage 2 Motor
AXIS POWER RACING- Stage 2 Motor
Last edited by Jay m A; 12 July 2007 at 10:01 PM.
12 July 2007, 10:19 PM
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Good point, how long are you prepared to wait? With the strong £ to $ pop over to the axis website and import a ready built forged 2.5 short motor
AXIS POWER RACING- Stage 2 Motor
AXIS POWER RACING- Stage 2 Motor
12 July 2007, 10:29 PM
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after i blew up my first 2.0 i went to a 2.5 and it was a world of difference as far as torque goes. i told myself i was never going back to a 2.0 after i drove the 2.5....but now i'm doing a 2.0 swap in the 96 impreza L.
basically, if you have the cash for a 2.5 GO FOR IT!!
basically, if you have the cash for a 2.5 GO FOR IT!!